Cemex’s plant near Lyons, Colo, is in violation of the federal Clean Air Act due to its production of acid rain- and smog-forming pollutants, the US EPA announced this week.  
 
The agency issued a notice of violation against the plant, which could lead to financial penalties in the future against the Mexico-based company.  
 
EPA said that Cemex began modifying the facility in 1997 without first obtaining the necessary permits and installing pollution controls required by the Clean Air Act, resulting in unpermitted releases of nitrogen oxides (Todd Hartman, Denver Rocky Mountain News, April 5).  
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